Method of destroying plant harmful microorganisms



United States Patent 3,102,069 METHOD OF DESTROYENG PLANT HARMFUL MlICRGQRGANlSMS Henderikus Ohias Huisman, Jan Hendrik Uhleuhroelr,

and Martinus Johannes Koopmans, all of Van Houtenlaan, Weesp, Netherlands, assignors to North Ameri- 'can Philips Company, Inc, New York, N.Y., a corporation of Delaware No Drawing. Original application June 11, 1956, Ser. No. 590,404, now Patent No. 3,014,837, dated Dec. 26, 1961. Divided and this application Mar. 6, 1961, Ser- No. 93,299 19 Claims. (Cl. 167-30) This application is a division of United States patent application Serial Number 590,404, filed June 11, 1956, now US. Patent No. 3,014,837.

The agents used in agriculture, horticulture and fruitgrowing to combat fungi or bacteria, to both of which will be referred to hereinafter as micro-organisms, have frequently the disadvantage that they may be at the same time more or less harmful to the plants to be protected from micro-organisms.

There are also substances, for example trichloromethyl-thiolsulphonates or organic mercury compounds that could be used on a larger scale to combat microorganisms in agriculture, horticulture and fruitgrowing, if their phytotoxical effect on the cultivated plants were not comparatively great. In order to avoid afiection by particular kinds of microorganisms, many cultivated plants must therefore be treated with means which are, properly speaking, less suitable for this purpose.

-In accordance with the invention it was now found that aromatic compounds having a fungicidal or bactericidal effect have small phytotoxicity, if at one of the carbon atoms of the aromatic nucleus there is bound an acylated amino group.

The invention relates to a method of producing agents for combating micro-organisms and is characterized in that a compound of the general formula:

is produced, wherein R designates an aromatic residue, of which one of the hydrogen atoms bound to a carbon atom of the aromatic nucleus is replaced by an acylamino group and one or more of the other hydrogen atoms of the aromatic nucleus is replaced by a group giving the compound fungicidal and/ or bactericidal properties. The aromatic nucleus may be a phenylor a naphthy-nucleus. The acyl group may be the acyl residue of a saturated or unsaturated, aliphatic carbonic acid or, also of a mixed aliphatic-aromatic or an aromatic carbonic acid, for example formic acid, acetic acid, propionic acid, butyric acid, Valerie acid, stearic acid, palmitic acid, crotonic acid, acrylic acid, oleic acid, phenylacetic acid, phenyl-propionic acid, phenyl butyric acid, benzoic acid; at and B naphthoic acid.

The term fungicide is to be understood to mean herein a compound having an LD of at least 3 p units in the experiments to be described hereinafter. A bactericide is to be understood to mean a compound which, in the experiments to be described hereinafter, in a concentration of mol/ml. of at least one of the bacteria employed in the experiments to be described produces a conspicuous reduction of the growth. A compound having a phytotoxic effect is to be understood to mean a compound which damages the leaves of Indian cross in the experiments to bedescribed hereinafter in a concentration of at least 10%, sprayed in a quantity of 10 cm. of these 10% solutions on 1000 cm. of leaf surface. It may be pointed out that it is known that acyl-amino compounds exert a smaller poisonous effect in some cases on living organisms than the corresponding non-acylated amino- "ice compounds. This phenomenon is particularly employed in animal physiology. With respect to this known fact, the invention, however, provides a completely new insight, since it has not yet been recognized that aromatic fungicides or bactericides have substantially no phytotoxic effect, if an acylated amino group is bound to a carbon atom of the aromatic nucleus.

The invention is of particular importance in reducing the phytotoxic effect of aromatic fungicides and/or bactericides. It has been found that the phytotoxic effect of aromatic fungicides and/ or bactericides, in which no acylated amino group is bound to the aromatic nucleus, is materially higher than the phytotoxic effect of aromatic fungicides and/ or bactericides of which the formula corresponds to fungicides and/or bactericides referred to in the beginning of this paragraph, from which they differ, however, in that a hydrogen atom bound to a carbon atom of the aromatic nucleus is replaced by an acylated amino group. In accordance with a preferred embodiment of the invention compounds of the general formula: RNH-acyl are produced, in which R designates an aromatic residue substituted in a manner such that the compound RH is an aromatic fungicide and/ or bactericide with phytotoxic effect. To the compounds of the formula RH apply, of course, the aforesaid definitions for fungicides, bactericides and compounds having a phytotoxic effect.

The fungicidal and/ or bactericidal acivity of the amino-acylated compounds may be lower than that of the non-amino-acylatedcompounds, but the difference in this effect is materially smaller than the difference in the phytotoxic effect of the amino-acylated compounds and of the non-amino-acylated compounds. On the other hand, owing to the introduction of an acyl-amino group the fungicidal or the bactericidal effect may increase, while in many cases this activity does not vary. According to the invention the phytotoxic effect of an aromatic fungicide or bactericide will decrease at any rate owing to the introduction of an acyl-amino group at the aromatic nucleus.

Hydrogen atoms of the aromatic nucleus of the com pounds according to the invention may be substituted by groups of very different chemical structure. These groups may, for example, have the following structure:

The compounds according to the invention can be produced in various ways. The acylated-amino group can be introduced into a compound of the formula RH, but as an alternative the starting material may be an aromatic compound, in which the acyl-amino group is already contained, this compound being then modified in a manner such that the compound R-NH-acyl is obtained.

The last-mentioned method will be especially prefererd when the substituents in the aromatic nucleus of the compound R-NH-acyl are chemically reactive and would decompose, if it would be attempted to introduce an acylamino group into aromatic compounds containing these groups. e

If the compound RNH-acyl is of a complicated structure, the substituents in the aromatic nucleus may be introduced in parts, the introduction of a further group being started before the substitution has been completed.

For the introduction of an amino-group into an aromatic nucleus various methods are available (vide inter alia Karrer, Organic Chemistry, 1938, page 412, for method of producing aromatic amines). An aromatic compound may, for example, be nitrated with nitric acid to obtain a nitro-compound, which substance is then reduced to the corresponding amino. This reduction may, for example be effected 'with tin and hydrochloric \acid or with iron and hydrochloric acid, but, if necessary, it may be carried out electro-chemically or by catalytic hydrogenation, for example under the action of Raney-nickel, platinum or palladium-catalysts. In a further method the amino group is introduced into the aromatic nucleus by converting an aromatic halide with ammonia. It is furthermore possible, in certain cases, for example with resorcinol, to replace an aromatic hydroxyl-group by an amino group under the action of ammonia, if the reaction mixture contains sulphite. Finally, aromatic carboxylic acids may be converted into the corresponding amines by the so-called Hofmann or Curtius method, which is carried out via the acid amides and the acid azides respectively.

The aromatic amino compounds may be converted into the corresponding acyl compound by acylating the amino groups with an acid halide, for example, acetic acid chlo ride, a carboxylic acid, for example, formic acid, acetic acid, propionic acid or with an acid anhydride, for example acetic acid anhydride or propionic acid anhydride.

As stated above, the fungicidal or the bactericidal groups may, if desired, be introduced subsequent to the introduction of the amino group and prior to the acylation: the said groups would be decomposed or separated out, if the aromatic compound, already containing these functional groups, would be aminated.

The invention is of particular importance for the production of fungicides and/or bactericides of the general formulae:

("1.0 .S.C Cla Aeyl NH (B) Q-S-S-C 0 Ch Acyl NH (O) Acyl NH wherein R designates hydrogen or an acyl residue.

(D) HO N02 Acyl NH N O a Acyl NH wherein Y designates hydrogen or a polar bond, for example a negative substitutent for example a nitro group.

Acyl NH I Acyl NH-C -CHzNOH may be produced by causing a metal salt of a compound of the formula:

C O OH Acyl NH to react with P.C.M. The reaction is preferably carried out in an a-polar solvent, for example, benzene, ligroine, cyclohexane, petroleum-ether at a temperature of 60 to C.

The compounds of the formula:

S.S.C o1;

Acyl N H may be produced by causing a thiophenol to react with P.C.M. The reaction is preferably carried out in an a-polar solvent, for example, benzene, petroleum-ether at a temperature of 50 to 100 C. It has been found that particularly the para-compounds of this kind of compounds are of importance.

The compounds of the general formula:

NH Acyl may be produced by nit-rating an acyl-amino-phenylester, for example, the acetate ester with concentrated nitric acid and by subsequent saponification of the nitrated ester obtained, with caustic soda, the phenolate obtained being converted with acid into the corresponding dinitro-acylamino phenol. Particularly the 2.4 dinitro-S-acyl aminophenol of this group of compounds has been found to be of importance.

The compounds of the general formula:

Acyl NH wherein Y designates hydrogen or a polar group, for example an N0 bond, may be produced by causing an acid halide, preferably an acid chloride of the formula:

Acyl NH Y to react with a metal azide, preferably an alkali azide, for example, sodium azide.

The acid halide is preferably dissolved in an organic solvent, which does not react with the acid halide, for example acetone, methyl-ethyl-ketone or benzene, this solution being added to an aqueous solution of the azide.

Compounds of this type according to the invention have yielded satisfactory results, when the acyl amino group occupies the para position relative to the group of CO.N If the group Y designates a negative substituent, for example, a nitro group, or a halogen atom, for example, chlorine, it is of importance that the group Y should be bound at the meta-position relative to the group of CO.N to the benzene nucleus.

The production of the compounds of the general formula Acyl NH may be carried out in a manner similar to that referred to in the description of the production of compounds of the general formula:

Acyl NH 5 stituent, 15% non-ionogeneous emulsifier and otherwise solvents (mainly ketones, for example cyclohexanone);

(b) Aerosols, the solvents being for example acetone, methyl-ethyl-ketone and cyclohexanone, the propellcnt being methyl-chloride or Freon;

Sprayable powders containing 50 to 80% active substance and otherwise flowing liquids, for example, fatty alcohol sulphonates, and disperging agents and/ or carriers, for example kaoline, chalk, clay and admixtures to prevent lumping, for example, colloidal silicic acid;

(d) Sprayable powders containing for example active substance in a mixture of infusorial silica, magnesium marlstone;

(e) Seed-protecting means, for example, 50% of the active substance combined with kaoline with the addition of adhesives, for example, watchmakers oil;

(1) So-called coated dust, the active substance being applied to an absorbing carrier, for example infusorial silica.

In the examples hereinafter methods of producing compounds according to the invention are described. (The temperatures in these examples are expressed in degrees centigrade.) The examples are followed by tables, in which the phytotoxic and fungitoxic properties of the arnino-acylated and the non-amino-acylated com pounds are indicated. The numerals indicated in each table for activity refer to a biological specimen series. The numerals of each table referring to a particular activity can be compared with one another. Of a few compounds indicated in the tables no examples are given. These compounds were produced in accordance with prescriptions known from literature. The method of determining the fungiatoxic effect of the tested compounds was performed as follows:

The compound to be tested was dissolved in acetone and so-called dilution series were made of this solution, this series being obtained by reducing each time the concentration of the compound to be tested by a factor 2. A few drops of each of these solutions of a size of 1 to 100 ml. were applied to glass plates, within parafiin rings provided thereon. The acetone was caused to evaporate, after which a drop of a size of 0.05 ml. of a suspension containing 10,000 spores of F usarium culmorum per ml. of medium was caused to flow within each ring. The medium was aqueous, diluted cherry extract having a dry-substance content of 0.1%. The glass plates were then kept in a humid space at 24 C. for 18 hours. It was then stated microscopically with what concentration of the compound to be tested the spores of Fusarium culmorum had no longer been able to germinate or showed still some signs of life in the form of swellin'gs,

and of a small percentage of very short cotyledons. This limit concentration was referred to as L.D. 95, i.e. this concentration means a lethal dose for 95% of the number of spores exposed to this concentration of the substance to be tested. This L.D. value was indicated in so-called p units. These are the negative logarithms (base of the concentration, expressed in grams per ml. Expressed in p units, the dilution with a factor 2 (as stated above) corresponds to an increase of p by 0.3 uni-t.

The bactericidal effect was determined as follows. The compound to be tested was dissolved in acetone or suspended in water containing 2% of .carboxymethyl-cellulose: of this solution or suspension a dilution series was made, the concentration of each term of the series differing by a factor 10 from that of the next-following term. 0.1 to 0.2 ml. of each solution was dispersed in ml. of a nutrient containing 1% of peptone, 0.3% of meat extract (both of the trademark Difco), 1% of glucose, 0.3% of a product known under the tradename of Poviet, 1% of KH PO 2.5% of agar-agar of the tradename of Bacto and otherwise main water (pH 6.8). These nutrients were then modulated with suspensions of the following bacteria: Pseudomonas pyocyaneas, Escherichia coli, Zdycobacterium phlei, Baccillus subtilis, Salmonella tlzyrz'um, Micrococcis auleus. Then the nutrients were kept at a temperature of 37 C. for 24 to 48 hours. For each dilution series the concentration of the tested compound was ascertained, which had just been able to bring about a total or substantially total reduction of the growth of the bacteria. This limit concentration was indicated by p which designates the negative logarithm (base 10) of the limit concentration expressed in grammolecules/ml. When it was found that within a dilution series the concentration of the tested compound was not so high as to produce reduction of growth, it was indicated in the associated table by a hyphen.

The phytotoxic eflFect of the tested compounds was dertermine-d by spraying acetonic solutions or aqueous suspensions of the substances to be tested in a given concentration on test plants.

The quantity .of liquid sprayedon the plants was 10 ml. per 1000 cm. of leaf surface, on which the test specimen were provided. The plants used for these experiments had in general height of 7 to 12 cms. Only in the case of the Indian cress use was made of cut leaves, which were put with their stems in a bottle of water after the treatment. After having been sprayed, the plants or, in the case of the Indian cress, the leaves'were put aside and kept at a temperature of 22 C. for five days. During this period the specimen were exposed to fluorescent tubes of the day-light type, whilst daylight was screened oif. At the end of this period the measure of burning of the leaves was determined. It was expressed as follows:

The experiments showed that the phytotoxic effect of' the same compound in the same concentration is the same in an acetone solution of the compound and in an aqueous suspension thereof. Blank experiments with acetone showed that the solvent in itself does not produce any damage to the leaves.

(A) COMPOUNDS OF THE GENERAL FORMULA O0.0.S.O Ola Acyl NH .1. Trichlormethyl-Mercaplo-p-Acetylaminobenz0ate CH3.C onnQ-oooso 013 From 12.0 g. (0.06 mol.) of dry sodium salt of p-acetaminobenzoic acid, 2.00 ml. of dry benzene and 12.2 g. (0.065 mol.) of P.C.M. was obtained by the method described in Example XIX 2 gs. of a crystalline compound, which, after recrystallization from benzene, decomposed at about 250 C. without melting and which was found to consist of not quite pure trichlormethyl-mercaptop acetylaminobenzoate.

II T richlormethyl-M ercaptobenzoate O-o 0.0.so 013 28.8 g. of dry sodium benzoate (0.2 mol) was suspended in 300 ml. of dry benzene, after which a solution of 41 g. (0.22 mol.) of P.C.M. in 12.0 ml. of dry benzene was added to the suspension. While stirring, the mixture was refluxed for 5 hours, after which the reaction mixture was filtered. After evaporation of the filtrate in vacuo an oil remained, which distilled in high vacuo at 113 to 118 C. The yield was about 29 g., i.e. about 53%, calculated mixture was refluxed. A small quantity of oil was separaton sodium benzoate. ed out, after which the reaction mixture was cooled to TABLE A Phytotoxicity Fungitoxicity, Coneen- Broad Cu- Peas Tomato LD 95 tration bean eumber I C1s.GS.0.CO-ONH.CO.CH: g 3 g g 2 }5.0 50 II enesoeoG g g g g g }s.o 5.0

(B) COMPOUNDS THE GENERAL FORMULA room temperature. Upon adding petroleum ether, 1.75 g.

of trichlormethyl-p-aeetaminophenyl-disulphide crystalled out and had a melting point of 155 C.

Aeyl NH TABLEB Phytotoxicity Fungitoxicity Concen- Broad Bush Ind. Ct. LD 95 tration bean bean 6 6 6 n1 chess- 3 3 4 5 6 4.7 1v C13.CS.S-ONECO.CH3 g g 8 i 53 III. Trichlormethyl-Phenyldisulphide (C) COMPOUNDS OF THE GENERAL FORMULA 'Ilhis compound was produced from thiophenol and 40 l lillAeyl P.C.M. gaglzthe method described in Ree. Trav. ch1m., 71, The following compounds were produced and compared 1065 (1 with phenol V IV. Trichlormethyl-p-Acetaminophenyl-Disulphide (VI) o. acetaminophenol (VII) M-aeetaminophenol CHa.CO.NH.C -S.S.Gla (VH1) pacetaminopheml TABLE C1 Phytotoxicity Bactericidal efieet Fungi- Contoxicity, Salmo- Micro- Pseudo Eseheri-Mycnr Bacileen- Broad Bush Ind. LD ConeenncZla coccus monas chia bactelus trabean beam Cr. tration typhiniaureus pyocycoli rium subtion I ureum anea phlez' tillu v 110. g 2 2 g }2.3 2.3 5 5 5 Hl;I.OO.CHa

I| IH.CO.CH3 VII Q g g 8 8 }2.0 2.0 7-8 I| IH.CO.CH VIII..- O 8 i }2.0 2.0 5-6 4.0 g. (0.024 mol) of p-acetamino thiophenol was dissolved in a mixture of 75 m1. of dry benzene and 4.5 g. These com-pounds were produced by partial acetyla- (0.024 mol.) of P.C.M. For 15 minutes the reaction 75 tion of the corresponding aminophenols The (following compounds were compared'with phenylacetate IX:

X O-acetamiuophenylacetate XI M-acetaminophenylacetate 10 rated out was filtered off, washed, dried and recrystallized from 250 ml. of ethylalcohol. The compound 2,4dinitro- S-acetaminophenylacetate (5.5 g.=37%) obtained consisted of orange brown needles with a melting point of XII I 5 148 to 1 49" :By dissolving this product in acetone and acetammophenylacet by treating it 'Wlth decolorising. carbon almost colorless These compounds were produced by acetylat-ion of the crystals with a melting point of 149' to 150 C. were obcorresponding aminophenols. tained.

TABLE Phytotoxieity Fungitoxicity, Concen- Broad Bush Ind. Or. LD 95 tration bean bean IX--." H 0.0-0- 10 2 3 I] O 3 0 1 g 2.0 2.0

I\|IH.C 0.011s

0 0 0 X H3o. .-0 3 1 0 1 l I\|T1E[.CO.OH3

10 2 1 0 XI. motto-Q 3 1 0 0 XIL--. H 0.0-0- -NH.CO.CH 10 0 0 0 3 n O a a o 0 0 l (D) COMPOUNDS OF THE GENERAL FORMULA 8.0 (0.028 mol) of 2,4-dinitro-5-aicetamino-phenyl- Acyl NH acetate was introduced into a solution of 3.0 g. (0.028 21 OH mol) of anhydrous soda in 100 ml. of water. The mixture obtained was slowly heated to a boiling point, until OZN N all solid substance had dissolved. Then the mixture was X1 2 4 .5. h l cooled and acidified with ZNHCI, after which 2,4-dinitro- CH: O O NH S-acetam-ino-phenol crystallized out. Acfiter filtering, washring and drying 6.2 g. (81%) of this compound with a OzN-OOH melting point of 161 to 163 C. was obtained. After re- I crystallization from a mixture of acetone and water the NO: substance had a melting point of 163.5 to 1-64.5 C.

TABLE D Phytotoxicity Bactericidal eflect Ftungi- 0 Ooncit Salmo- Micro- Pseudo- Escher- Myco- Bacilcentra- Broad Bush Ind. LD 95 Concennella coccus monas ichia bacterilussubtion bean bean Cr. tration typhiaureus pyocycoZi um tz'lus mureum anea phlei 10 6 6 6 XIII @4102 3 6 6 6 5.0 6.7 8 o l loz NHOOCH about XIV N02 10 1 1 4 4 4 3 1 O 6 8 5-6 on N02 10.0 g. of m-acetaminophenylaicetate was dissolved in (C) COMPOUNDS OF THE GENERAL FORMULA ml. of acetic acid anhydride, after which, while stirring and cooling at a temperature of 2 to -7 C., 33 ml. of nitric acid (S.W.1.5'2) was added in drops during one hour.

The reaction mixture was restirred at 20 to 25 C. for one hour and then poured out on ice. The product sepa- CO.N3

Acyl NH XV. Benzazide This substance is produced in accordance with a pre- :scription of J. Chem. Soc., 51, pages 24 to 38 (1929).

XVI. p-A cetamino-Benzazide CHthC ONE-QC O.N3

3.6 g. (0.02 mol) of p-acetamino-Ibenzoic acid was suspended in 36 ml. of dry ethyl-ether. Thereto was added XX. p-Acetaminobenzene-Sulphonazide TABLEE Phytotoxicity Bacterlcidial Efiect a s S Q s g --a a u N N a s a s s s e??? ,2 s a; E; E s. a 8 U 2 O s s E s S 2; a e asss as a o m m .5 o w E 1 a XV m -O g 2 g g s 5 5 11 11 XVI moo-Orruoocu. g 8 8 i i812} 6 a s 5.0 5.3

ll oa I| l'O2 6 6 7 5.3 5.3 xv111... N3.CO NH.CO.CHa 3 1 0 105} XIX NLSOPO g 3 g g} 4.1 4.4

xx msol- NH.CO.CH; g 8 g} 4.4 4.4

1.6 ml. (0.02 mol) of S001 This mixture was kept at room temperature for one hour while it was shaken occasionally: the initially formed viscous mass became partly crystalline. The ether was decanted and the last parts thereof were removed by evaporation. The residue was dissolved in 18 ml. of acetone and filtered to remove small fractions of undissolved substance. To the filtrate was added in drops, while cooled with ice (temperature lower than 5 C.), a solution of 1.5 g. of sodium azide in 5 ml. of water. This mixture was kept at 0 C. fior half an hour. By adding ice water a microcrystalline substance was precipitated. This substance was filtered off and washed with water. Yield: 2.0 g. (50%) of substantially pure p-acetaminobenzazide. The substance decomposed under evolution of gas at about 124 C. I

XVII. 3-Nitr0-Benzazide This compound was produced in accordance with a prescription of J. Pr. Chemie (2), 52, 228.

, ,X VIII. 3-Nitra-4-Acetamino-Benzazide GHaCONH OaN In accordance with the manner described in Example XXXV 7.3 g. (58%) of 3-nitro-4-acetamino benzazide was obtained from 11.2 g. (0.05 mol.) of 3-nitro-4-acetamino-benzoic acid. The substance decomposed at 118 C.

(D) COMPOUNDS OF THE GENERAL FORMULA -SO:.N3

Acyl NH XIX. Benzene-Sulphonazida This compound is described by Curtius and Lorenzen in J. P1. Chemie, 58, page 174. The substance was produced in the manner there described from benzenesulphochloride and sodium azide.

(E) COMPOUNDS OF THE GENERAL FORMULA CH:NOH

Acyl NH XXI. Salicylaldozime This substance was produced by a method as described in I.Am. Chem. Soc., 45, 1740 (1923).

XXII. 4-Acetamin0-Salicylaldoxime 0113.0 O.NH.

40.0 g. of 4-acetamino-salicylic acid and 57.2 g. of Na SO .10H O were dissolved, while stirring, at room temperature in a mixture of 1 litre of Water and /2 l. of ethanol. To the clear solution obtained was added in succession 450 g. of sodium chloride, 40 g. of p-toluidine and 64 g. of boric acid and then in the course of one hour sodium amalgam (produced from 310 g. of mercury and 13 g. of sodium) and 320 g. of boric acid.

The reaction mixture was stirred at room temperature for further 4 hours: then the voluminous precipitation was filtered off and the liquid was decanted from the mercury. The precipitation obtained was washed with 1 l. of boiling water and recrystallized 'from 400 ml. of ethanol. Thus 12.5 g. of the Schiifs base was obtained in the crystalline state. The dry crystals had a melting point of 210 to 211 C.

To a suspension of 12 g. of the Schiffs base in ml. of boiling ethanol was added asolution of 12 g. of

l3 l4 hydroxylamine-HOl in 36 ml. of water, a clear solution and being thus produced. The 4-acetaminosalicyl-aldoxim H soon began to crystallize in the form of almost colorless needles. After one night .at 0 C. the product was fil- Acyl'N tered off, Washed and dried. The yield was 7.9 (9 1%) calculated on the Sch-iffs base: the melting point was H 280 C. (while decomposing). CHNOH TABLE F Phytotoxicity Fungitoxicity LD 95 0011- Broad Bush Ind. centrabeen been Gr.

tion

XXI..." HON=CH Q lg g g g 4.1 4.1

XXII HON:CH NH.CO.CHa

I a a a l HO Table D shows that the fungitoxicity has decreased, wherein acyl in all of said formula represents the acyl four times owing to the introduction of an acetyl-aminoresidueof a monocar-boxylic acid selected from the group group at the position 5 in 2-4 dinitro-phenol, while the consisting of saturated aliphatic hydrocarbon, olefinically decrease in phytotoxicity is a multiple of the decrease in unsaturated hydrocarbon, phenylalkyl and naphtho-ic fungitoxicity. acids containing from 1 to 18 carbon atoms.

From Table C similar conclusions can he drawn. e 2. The. method of claim 1 in which the active com- While we have described our invention in connection pound is employed in the form of an aerosol containing with specific embodiments and applications, other modia solvent for the compound and a gaseous propellent fica-tions thereof will be readily apparent to those skilled therefor. in this art Without departing from the spirit and scope 3. The method of claim 1 in which the active comof the invention as defined in the appended claims. 5 pound is employed in the form of a mixable oil con What we claim is: taining an inert solvent for the compound and an emulsil. A method of destroying bacteria and fungi harmfier therefor. I v H ful to plants comprising contacting the plants with a non- 4. The method of claim 1 (in which the active comphytotoxic fungicidally and 'bactericidally .acti-ve compound is employed in the form or" a sprayable powder .pound selected from the group consisting of compounds 40 containing an inert solid carrier therefor.

having the following structural formula:v 5. The method of claim 1 in which the active compound is employed in the form of a seed protecting powder containing an adhesive and a solid inert carrier Acyl-N C 0 OS C Ola h f 1 kg 6. The method of claim 1 in which the active compound is employed in the form of a dusting composition containing an inert solid absorbent powder therefor.

AWLN g g 7. A method of destroying bacteria and fungi harmful to i plants comprising, contacting the plants with a non-phytotoxic pesticidal compound containing a compound correspondingto the formula:

Acyl-N 0R1 Acyl NH -ooosoo13 wherein R represents a substituent selected from the wherein acyl represents the lacyl residue of a monocar group Consisting of H r hoxylic acid selected from the group consisting of saturated HO N01 aliphatic hydrocarbon, olefinically unsaturated hydrocar W hon, phenylalkyl and naphthoic acids containing from 1 i to 18 carbon atoms andan inert carrier therefor. i I '8. A method of destroying bacteria and fungi harmful M to plants comprising, contacting the plants with a non- Acyl-N NO:

it phytotoxlc pest1c1dal compound containing a compound correspondm g to the (formula: A CHaCONHO-OOOSOC1:4 Acyl-N C-Na I i i and an inert carrier there-for.

Y '9. A method of destroying bacteria and fungi harmful p to plants comprising, contacting the plants with a nonwhereln Y rep-resents a member of the class consisting phywtoxic pesticidal compound containing a Compound of H and mm) radlcal corresponding to the formula:

S-SCCIa Acyl-lr SOr-Ns H Acyl NH wherein acyl represents the acyl residue of a monocarboxylic acid selected from the group consisting of saturated aliphatic hydrocarbon, olefinically unsaturated hydrocarbon, phenylalkyl and naphthoic acids containing from 1 to 18 carbon atoms and an inert carrier therefor.

10. A method of destroying bacteria and fungi harmful to plants comprising, contacting the plants with a nonphytotoxic pesticidal compound containing a compound corresponding to the formula:

CHaC OHN S-SCOla and an inert carrier therefor.

11. A method of destroying bacteria and fungi harmful to plants comprising, contacting the plants with a nonphytotox-ic pesticidal compound containing a compound corresponding to the formula:

Acyl NH O N3 wherein acyl represents the acyl residue of a monocarboxylic acid selected from the group consisting of saturated aliphatic hydrocarbon, olefinically unsaturated hydrocarbon, phenylalkyl and naphthoic acids containing from 1 to 18 carbon atoms and an inert carrier therefor.

12. A method of destroying bacteria and fungi harmful to plants comprising, contacting the plants with a nonphytotoxic pesticidal compound containing a compound corresponding to the formula:

CHsCONH- C 0N3 OzN and an inert carrier therefor.

13. A method of destroying bacteria and fungi harmful to plants comprising, contacting the plants with a nonphytotoxic pesticidal compound containing a compound corresponding to the formula:

011,0 ONHQ-C 0N:

and an inert carrier therefor.

14. A method of destroying bacteria and fungi harmful to plants comprising, contacting the plants with a nonphytotoxic pesticidal compound containing a compound corresponding to the formula:

Acyl NH SO2Na wherein acyl represents the acyl residue of a monocarboxylic acid selected from the group consisting of saturated aliphatic hydrocarbon, olefinically unsaturated hydrocarbon, phenylalkyl and naphthoic acids containing from 1 to 18 carbon atoms and an inert carrier therefor.

.15. A method of destroying bacteria and fungi harmful to plants comprising, contacting the plants with a nonphytotoxic pesticidal compound containing a compound corresponding to the formula:

and an inert carrier therefor.

16. A method of destroying bacteria and fungi harmful to plants comprising, contacting the plants with a nonphytotoxic pesticidal compound containing a compound corresponding to the formula:

Acyl NH OH:NOH

wherein acyl represents the acyl residue of a monocarboxylic acid selected from the group consisting of saturated aliphatic hydrocarbon, olefinically unsaturated hydrocarbon, phenylalkyl and naphthoic acids containing from 1 to 18 carbon atoms and an inert carrier therefor.

17. A method of destroying bacteria and fungi harmful to plants comprising, contacting the plants with a nonphytotoxic pesticidal compound containing a compound corresponding to the formula:

-CH:NOH

OHaCONH and an inert carrier therefor.

18. A method of destroying bacteria and fungi harmful to plants comprising, contacting the plants with a non-phytotoxic pesticidal compound containing a compound corresponding to the formula:

CHaCONH and an inert carrier therefor.

References Cited in the file of this patent UNITED STATES PATENTS 2,226,672 Smith Dec. 31, 1940 2,368,195 Britton Jan. 30, 1945 2,923,737 Ruschig Feb. 2., 1960 2,978,465 Jerchel Apr. 4, 1961 

1. A METHOD OF DESTROYING BACTERIA AND FUNGI HARMFUL TO PLANTS COMPRISING CONTACTING THE PLANTS WITH A NONPHYTOTOXIE FUNGICIDALLY AND BACTERICIDALLY ACTIVE COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE FOLLOWING STRUCTURAL FORMULA: 